All categories

3 years ago

Is -8-2 (3+2n)+7n equivalent to -30-13n

Mathematics

2 answers:

Alenkasestr [34]3 years ago

6 0

-8-6-4N+7N

-14+3N

That is the answre

Anna11 [10]3 years ago

4 0

-8 - 2(3 + 2n) + 7n
= -8 - 6 - 4n + 7n
= -14 + 3n

No, it is not equivalent to - 30 - 13n

You might be interested in

123456789qwertyuiopasdfghjklzxcvbnm

Ymorist [56]

Answer:

ldemhekuekeiwlow!q ok judmw un i follón uwkwu

4 0

3 years ago

Read 2 more answers

Christy went on a round-trip bicycle ride starting at her house. When she left, she traveled downhill at a rate of 24 kilometers

vazorg [7]

Since this is a round-trip, Christy covered the same distance in both journey.

Let the distance covered be
$d$

When she left the house, she travelled at
$24 \: kph$

We were given the average speed to be
$20 \: kph$

Meaning if we add the speed in the return journey to 24 kph and find the average , we must obtain 20 kph.

Let
$x$
be the speed in the return trip.

Then
$\frac{24 + x}{2} = 20$

We solve for x to obtain;

$24 + x = 40$

$x = 40 - 24 = 16 \: kph$

We were also told that she took half an hour longer in the return trip.

If we let
$t$
represent the time the first journey took, then the return trip will take

$(t + 0.5) \: hours$

Now we have the following:

$First Journey$

$speed = \frac{d}{t}$

$24 = \frac{d}{t}$

$\Rightarrow d = 24t - - - (1)$

$Second Journey$

$16 = \frac{d}{t + 0.5}$

$\Rightarrow d = 16(t + 0.5) - - - (2)$

Now let us equate the two equations to obtain,

$16(t + 0.5)= 24t$

We expand and simplify to obtain;

$16t + 8= 24t$

This implies that,

$8= 24t - 16t$

.
$8= 8t$

$t = 1$

Hence the return trip took,

$t + 0.5 = 1 + 0.5 = 1.5$

hours.

4 0

4 years ago

Where are the astmptotes for the following function located f(x)=7/x^2-2x-24

ira [324]

Answer:

Hence, the asymptotes of f(x) located at x=6 and x=-4.

Step-by-step explanation:

Since we have given that

f(x)= \frac{7}{x^2-2x-24}

We need to find the asymptotes for the above function:

Asymptotes occur when denominator becomes zero.

x^2-2x-24=0\\\\x^2-6x+4x-24=0\\\\x(x-6)+4(x-6)=0\\\\(x-6)(x+4)=0\\\\x=6,-4

6 0

3 years ago

Determine which two of the three given triangles are similar. Find the scale factor for the pair.

ivann1987 [24]

DEF and GHJ
the scale factor is 2/5

8 0

2 years ago

Is the line y=3x-7 parallel or perpendicular to 3x+9y=<br> 9?Explain your answer

g100num [7]

Answer:

yes, perpendicular

Step-by-step explanation:

perpendicular lines on a graph has opposite reciprocal slope

3x+9y=9 ( put the equation in the slope intercept form y=mx+b

9y=-3x+9

y=-3x/9+9

the slope of the first question is 3

the slope of the second equation is -1/3 x

yes the two lines are perpendicular

4 0

3 years ago